python类read()的实例源码

socket_afile.py 文件源码 项目:pycos 作者: pgiri 项目源码 文件源码 阅读 34 收藏 0 点赞 0 评论 0
def client_proc(host, port, input, task=None):
    # client reads input file and sends data in chunks
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock = pycos.AsyncSocket(sock)
    yield sock.connect((host, port))
    # data can be written to this asynchronous socket; however, for
    # illustration, convert its file descriptor to asynchronous file
    # and write to that instead
    afd = pycos.asyncfile.AsyncFile(sock)
    input = open(input)
    csum = hashlib.sha1()
    while True:
        data = os.read(input.fileno(), 16*1024)
        if not data:
            break
        csum.update(data)
        n = yield afd.write(data, full=True)
    afd.close()
    print('client sha1 csum: %s' % csum.hexdigest())
socket_afile.py 文件源码 项目:pycos 作者: pgiri 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def server_proc(conn, task=None):
    # conn is a synchronous socket (as it is obtained from synchronous
    # 'accept'); it's file-descriptor is converted to asynchronous
    # file to read data from that
    afd = pycos.asyncfile.AsyncFile(conn)
    csum = hashlib.sha1()
    nlines = 0
    while True:
        # read lines from data
        line = yield afd.readline()
        if not line:
            break
        csum.update(line)
        nlines += 1
    afd.close()
    print('server sha1 csum: %s' % (csum.hexdigest()))
    print('lines: %s' % (nlines))
socket_afile.py 文件源码 项目:pycos 作者: pgiri 项目源码 文件源码 阅读 30 收藏 0 点赞 0 评论 0
def client_proc(host, port, input, task=None):
    # client reads input file and sends data in chunks
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock = pycos.AsyncSocket(sock)
    yield sock.connect((host, port))
    # data can be written to this asynchronous socket; however, for
    # illustration, convert its file descriptor to asynchronous file
    # and write to that instead
    afd = pycos.asyncfile.AsyncFile(sock)
    input = open(input)
    csum = hashlib.sha1()
    while True:
        data = os.read(input.fileno(), 16*1024)
        if not data:
            break
        csum.update(data)
        n = yield afd.write(data, full=True)
    afd.close()
    print('client sha1 csum: %s' % csum.hexdigest())
socket_afile.py 文件源码 项目:pycos 作者: pgiri 项目源码 文件源码 阅读 34 收藏 0 点赞 0 评论 0
def server_proc(conn, task=None):
    # conn is a synchronous socket (as it is obtained from synchronous
    # 'accept'); it's file-descriptor is converted to asynchronous
    # file to read data from that
    afd = pycos.asyncfile.AsyncFile(conn)
    csum = hashlib.sha1()
    nlines = 0
    while True:
        # read lines from data
        line = yield afd.readline()
        if not line:
            break
        csum.update(line)
        nlines += 1
    afd.close()
    print('server sha1 csum: %s' % (csum.hexdigest()))
    print('lines: %s' % (nlines))
socket_afile.py 文件源码 项目:pycos 作者: pgiri 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def server_proc(conn, task=None):
    # conn is a synchronous socket (as it is obtained from synchronous
    # 'accept'); it's file-descriptor is converted to asynchronous
    # file to read data from that
    afd = pycos.asyncfile.AsyncFile(conn)
    csum = hashlib.sha1()
    nlines = 0
    while True:
        # read lines from data
        line = yield afd.readline()
        if not line:
            break
        csum.update(line)
        nlines += 1
    afd.close()
    print('server sha1 csum: %s' % (csum.hexdigest()))
    print('lines: %s' % (nlines))
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Return the next size number of bytes from the stream.
           If size is not defined, return all bytes of the stream
           up to EOF.
        """
        if size is None:
            t = []
            while True:
                buf = self._read(self.bufsize)
                if not buf:
                    break
                t.append(buf)
            buf = "".join(t)
        else:
            buf = self._read(size)
        self.pos += len(buf)
        return buf
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 30 收藏 0 点赞 0 评论 0
def fromtarfile(cls, tarfile):
        """Return the next TarInfo object from TarFile object
           tarfile.
        """
        buf = tarfile.fileobj.read(BLOCKSIZE)
        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
        return obj._proc_member(tarfile)

    #--------------------------------------------------------------------------
    # The following are methods that are called depending on the type of a
    # member. The entry point is _proc_member() which can be overridden in a
    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
    # implement the following
    # operations:
    # 1. Set self.offset_data to the position where the data blocks begin,
    #    if there is data that follows.
    # 2. Set tarfile.offset to the position where the next member's header will
    #    begin.
    # 3. Return self or another valid TarInfo object.
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 31 收藏 0 点赞 0 评论 0
def _proc_gnulong(self, tarfile):
        """Process the blocks that hold a GNU longname
           or longlink member.
        """
        buf = tarfile.fileobj.read(self._block(self.size))

        # Fetch the next header and process it.
        try:
            next = self.fromtarfile(tarfile)
        except HeaderError:
            raise SubsequentHeaderError("missing or bad subsequent header")

        # Patch the TarInfo object from the next header with
        # the longname information.
        next.offset = self.offset
        if self.type == GNUTYPE_LONGNAME:
            next.name = nts(buf, tarfile.encoding, tarfile.errors)
        elif self.type == GNUTYPE_LONGLINK:
            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)

        return next
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def __next__(self):
        """Return the next item using TarFile's next() method.
           When all members have been read, set TarFile as _loaded.
        """
        # Fix for SF #1100429: Under rare circumstances it can
        # happen that getmembers() is called during iteration,
        # which will cause TarIter to stop prematurely.
        if not self.tarfile._loaded:
            tarinfo = self.tarfile.next()
            if not tarinfo:
                self.tarfile._loaded = True
                raise StopIteration
        else:
            try:
                tarinfo = self.tarfile.members[self.index]
            except IndexError:
                raise StopIteration
        self.index += 1
        return tarinfo
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def copyfileobj(src, dst, length=None, exception=OSError, bufsize=None):
    """Copy length bytes from fileobj src to fileobj dst.
       If length is None, copy the entire content.
    """
    bufsize = bufsize or 16 * 1024
    if length == 0:
        return
    if length is None:
        shutil.copyfileobj(src, dst, bufsize)
        return

    blocks, remainder = divmod(length, bufsize)
    for b in range(blocks):
        buf = src.read(bufsize)
        if len(buf) < bufsize:
            raise exception("unexpected end of data")
        dst.write(buf)

    if remainder != 0:
        buf = src.read(remainder)
        if len(buf) < remainder:
            raise exception("unexpected end of data")
        dst.write(buf)
    return
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 27 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Return the next size number of bytes from the stream.
           If size is not defined, return all bytes of the stream
           up to EOF.
        """
        if size is None:
            t = []
            while True:
                buf = self._read(self.bufsize)
                if not buf:
                    break
                t.append(buf)
            buf = "".join(t)
        else:
            buf = self._read(size)
        self.pos += len(buf)
        return buf
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def fromtarfile(cls, tarfile):
        """Return the next TarInfo object from TarFile object
           tarfile.
        """
        buf = tarfile.fileobj.read(BLOCKSIZE)
        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
        return obj._proc_member(tarfile)

    #--------------------------------------------------------------------------
    # The following are methods that are called depending on the type of a
    # member. The entry point is _proc_member() which can be overridden in a
    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
    # implement the following
    # operations:
    # 1. Set self.offset_data to the position where the data blocks begin,
    #    if there is data that follows.
    # 2. Set tarfile.offset to the position where the next member's header will
    #    begin.
    # 3. Return self or another valid TarInfo object.
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 30 收藏 0 点赞 0 评论 0
def _proc_gnulong(self, tarfile):
        """Process the blocks that hold a GNU longname
           or longlink member.
        """
        buf = tarfile.fileobj.read(self._block(self.size))

        # Fetch the next header and process it.
        try:
            next = self.fromtarfile(tarfile)
        except HeaderError:
            raise SubsequentHeaderError("missing or bad subsequent header")

        # Patch the TarInfo object from the next header with
        # the longname information.
        next.offset = self.offset
        if self.type == GNUTYPE_LONGNAME:
            next.name = nts(buf, tarfile.encoding, tarfile.errors)
        elif self.type == GNUTYPE_LONGLINK:
            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)

        return next
tarfile.py 文件源码 项目:python- 作者: secondtonone1 项目源码 文件源码 阅读 30 收藏 0 点赞 0 评论 0
def addfile(self, tarinfo, fileobj=None):
        """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
           given, it should be a binary file, and tarinfo.size bytes are read
           from it and added to the archive. You can create TarInfo objects
           directly, or by using gettarinfo().
        """
        self._check("awx")

        tarinfo = copy.copy(tarinfo)

        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
        self.fileobj.write(buf)
        self.offset += len(buf)
        bufsize=self.copybufsize
        # If there's data to follow, append it.
        if fileobj is not None:
            copyfileobj(fileobj, self.fileobj, tarinfo.size, bufsize=bufsize)
            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
            if remainder > 0:
                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
                blocks += 1
            self.offset += blocks * BLOCKSIZE

        self.members.append(tarinfo)
tarfile.py 文件源码 项目:my-first-blog 作者: AnkurBegining 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Return the next size number of bytes from the stream.
           If size is not defined, return all bytes of the stream
           up to EOF.
        """
        if size is None:
            t = []
            while True:
                buf = self._read(self.bufsize)
                if not buf:
                    break
                t.append(buf)
            buf = "".join(t)
        else:
            buf = self._read(size)
        self.pos += len(buf)
        return buf
tarfile.py 文件源码 项目:my-first-blog 作者: AnkurBegining 项目源码 文件源码 阅读 31 收藏 0 点赞 0 评论 0
def fromtarfile(cls, tarfile):
        """Return the next TarInfo object from TarFile object
           tarfile.
        """
        buf = tarfile.fileobj.read(BLOCKSIZE)
        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
        return obj._proc_member(tarfile)

    #--------------------------------------------------------------------------
    # The following are methods that are called depending on the type of a
    # member. The entry point is _proc_member() which can be overridden in a
    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
    # implement the following
    # operations:
    # 1. Set self.offset_data to the position where the data blocks begin,
    #    if there is data that follows.
    # 2. Set tarfile.offset to the position where the next member's header will
    #    begin.
    # 3. Return self or another valid TarInfo object.
tarfile.py 文件源码 项目:my-first-blog 作者: AnkurBegining 项目源码 文件源码 阅读 30 收藏 0 点赞 0 评论 0
def _proc_gnulong(self, tarfile):
        """Process the blocks that hold a GNU longname
           or longlink member.
        """
        buf = tarfile.fileobj.read(self._block(self.size))

        # Fetch the next header and process it.
        try:
            next = self.fromtarfile(tarfile)
        except HeaderError:
            raise SubsequentHeaderError("missing or bad subsequent header")

        # Patch the TarInfo object from the next header with
        # the longname information.
        next.offset = self.offset
        if self.type == GNUTYPE_LONGNAME:
            next.name = nts(buf, tarfile.encoding, tarfile.errors)
        elif self.type == GNUTYPE_LONGLINK:
            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)

        return next
tarfile.py 文件源码 项目:my-first-blog 作者: AnkurBegining 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def __next__(self):
        """Return the next item using TarFile's next() method.
           When all members have been read, set TarFile as _loaded.
        """
        # Fix for SF #1100429: Under rare circumstances it can
        # happen that getmembers() is called during iteration,
        # which will cause TarIter to stop prematurely.
        if not self.tarfile._loaded:
            tarinfo = self.tarfile.next()
            if not tarinfo:
                self.tarfile._loaded = True
                raise StopIteration
        else:
            try:
                tarinfo = self.tarfile.members[self.index]
            except IndexError:
                raise StopIteration
        self.index += 1
        return tarinfo
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def copyfileobj(src, dst, length=None):
    """Copy length bytes from fileobj src to fileobj dst.
       If length is None, copy the entire content.
    """
    if length == 0:
        return
    if length is None:
        shutil.copyfileobj(src, dst)
        return

    BUFSIZE = 16 * 1024
    blocks, remainder = divmod(length, BUFSIZE)
    for b in xrange(blocks):
        buf = src.read(BUFSIZE)
        if len(buf) < BUFSIZE:
            raise IOError("end of file reached")
        dst.write(buf)

    if remainder != 0:
        buf = src.read(remainder)
        if len(buf) < remainder:
            raise IOError("end of file reached")
        dst.write(buf)
    return
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Return the next size number of bytes from the stream.
           If size is not defined, return all bytes of the stream
           up to EOF.
        """
        if size is None:
            t = []
            while True:
                buf = self._read(self.bufsize)
                if not buf:
                    break
                t.append(buf)
            buf = "".join(t)
        else:
            buf = self._read(size)
        self.pos += len(buf)
        return buf
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def read(self, size):
        b = [self.buf]
        x = len(self.buf)
        while x < size:
            raw = self.fileobj.read(self.blocksize)
            if not raw:
                break
            data = self.bz2obj.decompress(raw)
            b.append(data)
            x += len(data)
        self.buf = "".join(b)

        buf = self.buf[:size]
        self.buf = self.buf[size:]
        self.pos += len(buf)
        return buf
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def readsparsesection(self, size):
        """Read a single section of a sparse file.
        """
        section = self.sparse.find(self.position)

        if section is None:
            return ""

        size = min(size, section.offset + section.size - self.position)

        if isinstance(section, _data):
            realpos = section.realpos + self.position - section.offset
            self.fileobj.seek(self.offset + realpos)
            self.position += size
            return self.fileobj.read(size)
        else:
            self.position += size
            return NUL * size
#class _FileInFile
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 28 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Read at most size bytes from the file. If size is not
           present or None, read all data until EOF is reached.
        """
        if self.closed:
            raise ValueError("I/O operation on closed file")

        buf = ""
        if self.buffer:
            if size is None:
                buf = self.buffer
                self.buffer = ""
            else:
                buf = self.buffer[:size]
                self.buffer = self.buffer[size:]

        if size is None:
            buf += self.fileobj.read()
        else:
            buf += self.fileobj.read(size - len(buf))

        self.position += len(buf)
        return buf
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def fromtarfile(cls, tarfile):
        """Return the next TarInfo object from TarFile object
           tarfile.
        """
        buf = tarfile.fileobj.read(BLOCKSIZE)
        obj = cls.frombuf(buf)
        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
        return obj._proc_member(tarfile)

    #--------------------------------------------------------------------------
    # The following are methods that are called depending on the type of a
    # member. The entry point is _proc_member() which can be overridden in a
    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
    # implement the following
    # operations:
    # 1. Set self.offset_data to the position where the data blocks begin,
    #    if there is data that follows.
    # 2. Set tarfile.offset to the position where the next member's header will
    #    begin.
    # 3. Return self or another valid TarInfo object.
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 35 收藏 0 点赞 0 评论 0
def _proc_gnulong(self, tarfile):
        """Process the blocks that hold a GNU longname
           or longlink member.
        """
        buf = tarfile.fileobj.read(self._block(self.size))

        # Fetch the next header and process it.
        try:
            next = self.fromtarfile(tarfile)
        except HeaderError:
            raise SubsequentHeaderError("missing or bad subsequent header")

        # Patch the TarInfo object from the next header with
        # the longname information.
        next.offset = self.offset
        if self.type == GNUTYPE_LONGNAME:
            next.name = nts(buf)
        elif self.type == GNUTYPE_LONGLINK:
            next.linkname = nts(buf)

        return next
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 33 收藏 0 点赞 0 评论 0
def addfile(self, tarinfo, fileobj=None):
        """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
           given, tarinfo.size bytes are read from it and added to the archive.
           You can create TarInfo objects using gettarinfo().
           On Windows platforms, `fileobj' should always be opened with mode
           'rb' to avoid irritation about the file size.
        """
        self._check("aw")

        tarinfo = copy.copy(tarinfo)

        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
        self.fileobj.write(buf)
        self.offset += len(buf)

        # If there's data to follow, append it.
        if fileobj is not None:
            copyfileobj(fileobj, self.fileobj, tarinfo.size)
            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
            if remainder > 0:
                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
                blocks += 1
            self.offset += blocks * BLOCKSIZE

        self.members.append(tarinfo)
tarfile.py 文件源码 项目:kinect-2-libras 作者: inessadl 项目源码 文件源码 阅读 36 收藏 0 点赞 0 评论 0
def next(self):
        """Return the next item using TarFile's next() method.
           When all members have been read, set TarFile as _loaded.
        """
        # Fix for SF #1100429: Under rare circumstances it can
        # happen that getmembers() is called during iteration,
        # which will cause TarIter to stop prematurely.
        if not self.tarfile._loaded:
            tarinfo = self.tarfile.next()
            if not tarinfo:
                self.tarfile._loaded = True
                raise StopIteration
        else:
            try:
                tarinfo = self.tarfile.members[self.index]
            except IndexError:
                raise StopIteration
        self.index += 1
        return tarinfo

# Helper classes for sparse file support
shell.py 文件源码 项目:NeoAnalysis 作者: neoanalysis 项目源码 文件源码 阅读 34 收藏 0 点赞 0 评论 0
def shell(cmd):
    """Run each line of a shell script; raise an exception if any line returns
    a nonzero value.
    """
    pin, pout = os.pipe()
    proc = sp.Popen('/bin/bash', stdin=sp.PIPE)
    for line in cmd.split('\n'):
        line = line.strip()
        if line.startswith('#'):
            print('\033[33m> ' + line + '\033[0m')
        else:
            print('\033[32m> ' + line + '\033[0m')
        if line.startswith('cd '):
            os.chdir(line[3:])
        proc.stdin.write((line + '\n').encode('utf-8'))
        proc.stdin.write(('echo $? 1>&%d\n' % pout).encode('utf-8'))
        ret = ""
        while not ret.endswith('\n'):
            ret += os.read(pin, 1)
        ret = int(ret.strip())
        if ret != 0:
            print("\033[31mLast command returned %d; bailing out.\033[0m" % ret)
            sys.exit(-1)
    proc.stdin.close()
    proc.wait()
shell.py 文件源码 项目:NeoAnalysis 作者: neoanalysis 项目源码 文件源码 阅读 32 收藏 0 点赞 0 评论 0
def shell(cmd):
    """Run each line of a shell script; raise an exception if any line returns
    a nonzero value.
    """
    pin, pout = os.pipe()
    proc = sp.Popen('/bin/bash', stdin=sp.PIPE)
    for line in cmd.split('\n'):
        line = line.strip()
        if line.startswith('#'):
            print('\033[33m> ' + line + '\033[0m')
        else:
            print('\033[32m> ' + line + '\033[0m')
        if line.startswith('cd '):
            os.chdir(line[3:])
        proc.stdin.write((line + '\n').encode('utf-8'))
        proc.stdin.write(('echo $? 1>&%d\n' % pout).encode('utf-8'))
        ret = ""
        while not ret.endswith('\n'):
            ret += os.read(pin, 1)
        ret = int(ret.strip())
        if ret != 0:
            print("\033[31mLast command returned %d; bailing out.\033[0m" % ret)
            sys.exit(-1)
    proc.stdin.close()
    proc.wait()
tarfile.py 文件源码 项目:Flask_Blog 作者: sugarguo 项目源码 文件源码 阅读 34 收藏 0 点赞 0 评论 0
def read(self, size=None):
        """Return the next size number of bytes from the stream.
           If size is not defined, return all bytes of the stream
           up to EOF.
        """
        if size is None:
            t = []
            while True:
                buf = self._read(self.bufsize)
                if not buf:
                    break
                t.append(buf)
            buf = "".join(t)
        else:
            buf = self._read(size)
        self.pos += len(buf)
        return buf


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